Magazine-gun.



6, I M 2 n U. m. m M* a T O J w j@ M Q E. A. MGKEEN.

MAGAZINE GUN.

APPLICATION FILED sIIPT ze 190s MM If. u

bil

UNrrnn siagne PATENT OFFTO.

MAGAZINE-GUN.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application Hled September 28, 1903. Serial No. 174,861.

To (L// whom, t Wray concern.-

Be it known that I, EMROE A. MCKEEN, a subject of the King of GreatBritain, residing at Boston, in the county of Suffolk and State ofMassachusetts, have invented an Improvement in Magazine-Guns, of whichthe following description, in connection with the accompanying drawings,is a specification, like numerals on the drawings representing likeparts.

This invention relates to a magazine-gun, and has for its object toimprove generally this type of gun.

One of the features of the invention relates to a construction wherebythe magazine operates both to hold the cartridges and to secure theback-stock to the receiver of the gun.

Another feature of the invention relates to means for controlling thefeed of the cartridges from the magazine into the barrel; and stillanother feature relates to the means for ejecting the empty shells fromthe gun g and still another feature relates to the means for locking andunlocking and opening the action.

A construction embodying these various features of the invention isillustrated .in the drawings and will be more fully hereinafterdescribed. i

Figure l is a top plan view of a gun embodying my improvements. Fig. 2is a section on the line Fig. 1. Fig. 3 is a section on the line y y,Fig. 2. Figs. 4 and 5 are sections on the line a a, Fig. 2, showingdifferent positions of the lock. Fig. 6 is a section on the line b b,Fig. 2. Fig. 7 is an enlarged view of the operative parts of the gun onthe section-line fr Fig. 1, showing the action opened. Fig. S is a viewof the parts below the line c c, Fig. 7. Fig. 9 is a section on the lined el, Fig. 7. Fig. 10 is a section on the line e e, Fig. 9. Fig. 1l is avertical section through the pivot for the trigger.

6 designates the barrel of the gun, 5 the back-stock, and 3 a receiverto which the back-stock is secured and in which the barrel is slidablymounted. Said receiver has an opening 4 for the admission of cartridgesto the magazine and also for the discharge of empty shells and isconstructed with the portion 7, which constitutes the breech of the gunand in which the usual firing-pin 8 is mounted.

The magazine is designated by 9, and it is contained within theback-stock. In this form'of my invention said magazine is tubular inshape and constructed to receive aseries of cartridges, as shown in Fig.2, said magazine communicating with the receiver, as will be presentlydescribed. The forward end of the back-stock is shaped, as at 10, to fitinto the rear end of the receiver, and the magazine 9, which extendsentirely through the back-stock, has screw-threaded on its rear end anut 11, which engages the backstock and secures it to the receiver. Theforward end of the magazine is rigidly secured to the receiver in anysuitable way, as by screwthreading it into the boss 13 of the receiver.'The end of the stock is covered by the usual plate 14. The magazinethus serves the double function of holding the cartridges and securingthe stock to the receiver.

One feature of my invention relates to the manner in which the action isopened and closed. The rear end of the barrel is slidably mounted andtelescopes in an aperture in the front end of the receiver, so that saidbarrel may be moved longitudinally from the position shown in Fig. 2, inwhich the action is closed, to that shown in Fig. 7, in which the actionis opened. Vhen the barrel is in the position shown in Fig. 2, its endrests against the breech 7 of the gun and said barrel closes the opening4 in the receiver. Suitable means hereinafter described are employed forlocking the barrel in this position while 'the cartridge is fired; butwhen the barrel is unlocked it can be moved outwardly into the positionshown in Fig. 7 to uncover the opening 4 in the receiver.

16 designates a collar fast to the barrel, and 17 is the usual forearmportion of the gun. The collar 16 is preferably so positioned that itengages the receiver 3 when the action is closed, as seen in Figs. 1 and2.

The barrel is limited in its outward movement by a pin or stop 19,extending through the receiver, with which a shoulder 20 Ona lockingmember 18, rigid with the barrel, is adapted to be brought intoengagement. (See Fig. 7 The rear end of the member 18 plays back andforth in a suitable opening in the lower portion of the receiver 3. Thepin 19, which is a take-down stop, is preferably so mounted in thereceiver that it can be partially withdrawn therefrom and removed fromthe path of the shoulder 20 to enable the barrel to be entirely removedfrom the receiver. Said pin 19 is herein illustrated as being normallyheld in place by means of a spring-pressed locking-pin 21, which engagesa groove 22 therein. The end of the lockingpin 2l is rounding, so thatby applying sufficient force to the exposed end of the takedown pin 19the latter can be partially withdrawn from the receiver, and when thishas occured the barrel can be entirely removed from the gun, as abovestated. A second groove 200 in said take-down pin is engaged by thelocking-pin for the purpose of preventing the take-down pin 19 frombecoming lost. This manner of slidably mounting the barrel in thereceiver enablesme to use a longer barrel without'increasing the totallength of the gun, for when the gun is ready for firing the barrel istelescoped within the receiver, thereby reducing the total length of thegun.

I will now describe the means for feeding and controlling the feed ofthc cartridges to the barrel. It will be observed that the point wherethe magazine opens into the receiver or the mouth of the magazine is sosituated that when the action is closed the rear end of the barrelpartially closes said magazinemouth, as seen in Fig. 2. Vhen, however,the action is opened, as shown in Fig. 7, the mouth of the receiver isexposed, so that cartridges may be placed in the magazine through thereceiver-opening 4L.

23 designates a spring within the magazine and which normally tends toforce the cartridgey toward the mouth thereof, said spring restingagainst a sliding follower 24, which is adapted to engage the lastcartridge of the series.

25 is a restraining device which is adapted to engage thecartridge-shells vand prevent their being forced out of the magazinethrough the action of the spring 23. As the action is opened, as seen inFig. 2, and the barrel removed from in front of the first cartridge mthe spring 23 forces all of the cartridges toward the magazine-mouth andbrings the second cartridge a against the restraining device 25, thusarresting further movement of the cartridges. During this movement thecartridge m has been carried into the receiver, as shown in Fig. 7, andinto position to be picked up by the barrel 6 when the action is closed.The closing of the action releases the restraining device 25 and permitsthe cartridges to move again toward the magazine-mouth, so as to bringthe second cartridge a against the barrel. In order thus to release therestraining device, I have shown the same as connected to the ejectorpin26, by means of which the shells are ejected, as will be presentlydescribed, said pin being slidably mounted in the breech 7 and acted onby a suitable spring 27.

The particular restraining device herein shown has the catch 28, whichprojects through a slot in the wall of the magazine 9 and normallystands in the path of the flange 29 on the cartridge-shell, and also atoe 30, resting upon the inclined or cam surface 3l on the wall of themagazine. Said restraining device is illustrated as being pivoted to theend of the ejector-pin 26 in any suitable way and as carrying a spring32. which ena lip 33 on the end of said pin and operates to yieldinglyhold the restraining device in operative position. The ejector-pin 26 isprovided at its free end with a lip 34, which is adapted to engage theunder side of the Hange 29 of the cartridge-shell, as best seen in Fig.7. Said pin normally projects slightly through the breech into thereceiver 5 but when the action is closed, as shown in Fig. 2, the end ofthe cartridge-shell by its engagement with the ejector-pin forces thelatter rearward, and thus carries the restraining device 25 in the samedirection. This movement of the restraining device causes the toe 30 toride over the inclined surface 3l and lifts the catch or shoulder 23 outof the path of the cartridges. The closing of the action thereforereleases the restraining device, as above described. I have alsoprovided means whereby when the action is opened the foremost cartridgewill be prevented from falling out through the open receiver in case thegun is turned on its side or even bottom side up. This enables me to hrethe gun in any position. In this form of my invention the portion 36 ofthe receiver constitutes the cradle on which the cartridge rests just asbefore it is picked up by the barrel when the action is closed, and saidcradle or restrainer has the inclined surface 37, on which the cartridgerests, and the semi-annular shoulder 38, against which the head 29 ofsaid cartridge abuts, as seen in Fig. 7.

The inclined surface 37is so positioned that the bullet or slug p of thecartridge stands in such position that during the closing of the actionit enters the breech end of the barrel. (See Fig` 7.) The shoulder 38isso positioned that the distance between the same and the shoulder 28 ofthe restraining device is slightly less than the total length of thecartridge. With such construction whenever the action is opened thespring 23 operates to force the row of cartridges forward until theforemost cartridge engages the shoulder 38. At this time the secondcartridge does not quite enthe shoulder 28, so that the full force ofthe spring 23 is transmitted through the successive cartridges to theforemost cartridge, and thus holds it firmly against the shoulder 3S andprevents said cartridge from being dislodged in any position of the gun.This same construction holds the cartridges in the magazine when the gunis taken down and the barrel entirely removed. I regard this as quiteimportant, because incase it is necessary to entirely remove the barrelfrom the receiver for any reason it is unnecessary to remove thecartridges from the magazine, for the latter are securely held thereinregardless of the position of the back-stock.

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To release the cartridge from the shoulder 38 to enable it to be pickedup by the barrel when the action is closed, it is necessary to force thecartridge back slightly to bring the iange 29 thereof into the enlargedportion 39 of the cradle. This is accomplished by the backward movementof the gun-barrel, which by its 'friction with the cartridge as it picksit up first forces it backwardly slightly until the flange 29 has thusreached the enlarged portion 39, when the cartridge is fully released.Further backward movement of the barrel brings the cartridge against thebreech, so that the cartridge is forced into the barrel, as shown inFig. 2. foremost cartridge has been removed from in front of the secondcartridge, the latter moves toward the receiver under the influence ofthe spring 23 until its flange 29 engages the restraining device 25.Vhen the action is entirely closed, the cartridge in the barrel isbrought against the ejector-pin and the latter forced rearward, therebyremoving the restraining device from the path of the flange 29, when thecartridges remaining in the magazine will move forwardly until theforemost one strikes the barrel, as seen in Fig. 2.

The operation of ej ecting the emptyshells will now be described.

40 designates a catch which is pivoted to a pin 41, carried by thereceiver, and is acted against by a spring 42. The end of the catch isadapted to be received in a notch 44, formed in the end of the barrelwhen the action is closed to permit the nose 43 of the catch to passover and engage the flange 29 of the cartridge.

Vhen the action is opened and the barrel withdrawn, the catch 40 by itsengagement with the shell holds the latter from movement with thebarrel, whereby the shell is extracted from the barrel. As soon as theshell is free from the barrel the ejector-pin 26 is given a quickforward impulse by the spring 27,' which results in throwing the shellout through opening 4, said shell turning about the catch 40 as afulcrum.

I prefer to place the ejector-pin at an inclination to the barrel and insuch a position that itsvforward movement will be substantiallytangential to the curved path through which the bottom side of theshell-flange 29 travels as said shell is turned about the catch 40, sothat there will be no appreciable sliding movement of the ejector-pinover the end of the shell, as would be the case if said pin stoodparallel to the barrel.

In order that the ej ecting of the shells may be certain each time, itis essential that each shell should not drag over the end of the barrelas the shell clears the barrel. I prevent this by providing meanswhereby the movement of the barrel is accelerated just at the 'pointwhen the shell is clearing the barrel.

In this form of my invention this accelera- When the tion of themovement of the barrel is accomplished by means of the cooperation ofthe cocking-lever 43aL and the cam-track 44a, which is formed on thelocking member 18. The cocking-lever is pivoted to the guardpiece 45 bymeans of a suitable pin 46 and carries at one end a roll 47, adapted -tocoperate with the cam-track 44a. At the other end the cooking-lever haspivoted thereto a paWl 48, which engages a notch or shoulder 49 on thehammer 50. When the action is closed, the cocking-lever normally assumesthe position shown in Fig. 2, and as the barrel is withdrawn the roll 47by its engagement With the cam-track 44'L gradually rocks thecooking-lever about its pivot and into the position shown in Fig. 7,this movement of the lever operating through the pawl 48 to cock thehammer, as will be obvious. The hammer is held cocked by means of theusual sear 51.

The track 44L is provided with the rise or point 57, which is so placedthat the roll 47 passes thereover just prior to the time when the shellclears the barrel. Just after the roll 47 passes over the point 57 themovement of the barrel becomes easier, and since the operator isexerting approximately a uniform force in moving the barrel outward saidbarrel is given a quick movement just after the roll has passed therise, such quick movement being at the time when the shell is clearingthe barrel. The result is that the barrel is withdrawn suddenly from theend of the shell and all danger of the shell dragging over the barrelsend is thus avoided.

The means for locking and 'unlocking the barrel will now be described.

As herein shown, the locking member 18 is provided at one side with alocking-notch 55, in which a locking projection 56 on the receiver isadapted to be engaged, as shown in Fig. 3. This locking projection canbe disengaged from the locking-notch by turning the barrel on its aXiswith reference to the receiver, the opening 58 in the receiver throughwhich the locking member 18 passes being offset or enlarged to permit ofsuch turning movement. The unlocking or locking of the action thereforemerely consistsin turning the axis slightly with reference to thereceiver.

For holding the locking-notch either in or out of operative position Ihave illustrated a locking lever or member 60, pivoted at one end to theguard 45, as at 61, and having two recesses or depressions 62, eitherone of which is adapted to receive a spring-pressed pin 63. Said member60 has rising therefrom a lug 64, which when the action is closed isreceived in a slot or recess in the end of the locking member 18. (SeeFig. 3.) I/Vhen the action is closed therefore, the turning movement ofthe barrel and the consequent swinging movement of the locking member-18about the axis of the barrel operates through the lug 64'to IOO IIO

swing the locking-lever 60 from the position shown in Fig. 5 to thatshown in Fig. 4, the spring-pressed pin 63 yielding sufficiently toadmit of this movement. The engagement of the pin 63 in either of therecesses 62 operates to hold the locking-lever in its adjusted position,and thus prevents the barrel from being turned except by the use ofconsiderable force.

The locking-lever 60 in addition to its function as a means for holdingthe action locked or unlocked also has the function of locking thetrigger 52 when in the position shown in Fig. 4, thereby preventing any-possibility of the trigger being operated and the gun being ired whenthe action is opened, for it will be understood that in order to openthe action it is necessary irst to unlock the barrel, as abovedescribed, and in so doing carry the locking-lever trom the positionshown in Fig. 5 to that shown in Fig. 4. This locking of the trigger isaccomplished by means of the end 68 of the locking-lever, which when inthe position shown in Figs. 4 and 7 slides under the end 70 of thetrigger and prevents the latter from being operated. When thelocking-lever is in the position shown in Fig. 5, which is the positionoccupied by it when the action is closed and locked, the end 68 iscarried out from under the end 70 of the trigger, thus permitting thelatter to be freely operated. The above-described construction alsooperates to lock positively the action when the trigger is operated orthe gun ired, so that it 'will be impossible for the action to becomeunlocked when the gun is being ire'd. It will be noted that when theaction is locked the end 68 of the locking-lever stands one side or outof the path of movement of the end 70 of the trigger and that when thetrigger is turned said end 70 is brought into the path of movement ofthe said end 68. The result is that when the gun is being ired thetrigger absolutely prevents the locking-lever from being moved from theposition illustrated in Fig. 5 to that illustrated in Fig. 4, and thusprevents the gun from becoming unlocked. I have also provided meanswhereby the swinging of the locking-lever from the position shown inFig. 4 to that shown in 5 operates to throw the cocking-lever 43a intothe position shown in Fig. 2 or into its operative position to cock thehammer. This insures that said cocking-lever will be thrown into properposition 'for cocking the hammer whenever the action is closed. Toaccomplish this, l mount in the block 45, in which the pin 63 isreceived, a pivoted lever 71, one end of which projects beyond saidblock and is received in a recess 72 in the cooking-lever. The other endis provided with the cam projection 73, which coperates with acam-surface 74 on the locking-lever. (See Fig. 5.) This pin is situatedto the left of the pivot of the cocking-lever. (See Fig. 7.) As thelocking-lever is thrown from the position Fig. 4 into that shown in Fig.5 the inclined surface 74, acting on the nose 73, locks the lever 71,and thus elevates that end thereof which engages the cocking-lever, thusthrowing the latter into the position shown in Fig. 2.

The locking member 18 passes through the lug 101, which is rigid withthe barrel and is held in position by means of nuts 102, which aresituated either side of said lug. These nutsl not only serve to securethe locking member to the barrel, but also provide means whereby saidmember can be adjusted longitudinally of the barrel to take up wearbetween the locking proj ection56 and the shoulders of the locking-notch55, whereby the butt-end of the barrel may always be held hard againstthe breech when the action is closed. 103 designates a check-nut whichmay be used, it desired, to still further strengthen the connectionbetween the locking member and the barrel.

76 designates a safety-catch which is suitably pivoted in the block 45aand has the nose 77, which is adapted to be swung under a shoulder 7 8on the trigger whenever it is desired to lock the trigger.

Normally the safety-catch occupies the position shown in Fig. 7. lregard the position in which the safety-catch is placed as veryadvantageous. It will be noted that said catch is immediately in irontof the trigger 52 andis so pivoted that its lower end has to be pushedforward in order to swing it into operative position. Being situatedwhere it is, it can be very easily operated by the foreinger of theperson using the gun without withdrawing his inger from thetriggerguard, and because it requires a forward movement to throw thecatch into operative position there is no danger of improperlymanipulating the catch while the trigger is being operated. In most gunsthe safetycatch is placed so that in order to operate it the personusing the gun has to remove his hand entirely from the trigger-guard.The sear is herein shown as having the two ears 51a, which are pivotedon the pivotal pin 98 for the trigger and between which said triggerplays. l

After the gun has been iired the first action is to turn the barrelslightly with reference to the receiver, and thus swing thelocking-lever from the position shown in Fig. 5 to that shown in Fig. 4.This movement unlocks the barrel, so that the latter may be drawnoutwardly into the position shown in Fig. 7 and at the same time locksthe trigger, as above described. During this outward movement of thebarrel the cocking-lever is acted upon by the track 44, and the hammeris cocked and also the shell is extracted and ejected from the receiver,as above described. To reload the gun, it is merely necessary to returnthe barrel to the position shown in ICO IIO

Figs. 1 and 2, this movement operating to pick up the foremostcartridge, as fully described above. After the action has been closed itis relocked by simply turning the barrel slightly back into its originalposition. The motions required of the person using the gun, therefore,are very simple, being merely a slight turning movement with the handoperating .the fore-arm and a back-and-forth movement of the barrel.This makes a gun which can be fired with extreme rapidity.

I/Vhile I have herein shown one embodiment of my invention, I do notwish to be limited to the details of construction shown, as the variousoperations performed and which I think are new can be carried out bymechanisms having different details of construction. I therefore reservethe right to myself to make any and all such changes as come within thescope of the appended claims.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. In a magazine-gun, a receiver, a magazine opening directly into saidreceiver and shaped to receive cartridges end to end, a barrel slidablymounted in the receiver and movable manually in both directions to coverand uncover the mouth of the magazine, said mouth being so situated withreference to the path of movement of the rear end of the barrel that theforemost cartridge in the magazine is picked up directly therefrom bysaid barrel during its backward movement, manually-controlled means tolock the gun while the cartridge is iired and means operatedindependently from the movement of the barrel to fire said cartridge.

2. In a magazine-gun, a receiver having an opening for the discharge ofshells, a barrel slidably mounted in the receiver and movable manuallyin both directions, a magazine opening directly into the receiver shapedto receive cartridges arranged end to end and having an angular relationto the barrel, means in the magazine to feed cartridges forwardtherefrom into the receiver, manuallycontrolled means to lock the barrelfrom movement while the gun is being fired, and means to extract andeject the shell during the forward manual movement of the barrel, themouth of the magazine being so situated with reference to the path ofmovement of the rear end of the barrel that the foremost cartridge inthe magazine is picked up directly therefrom by said barrel during itsbackward movement.

3. In a magazine-gun, a receiver having an opening for the discharge ofshells, a magazine opening directly into the receiver, a barrel slidablymounted in the receiver and manually movable exclusively to cover anduncover both the mouth of the magazine and said opening7 means to lockthe barrel from movement while the gun is being fired, an eX-tractor-catch, and a spring-pressed ejectorpin, the mouth of themagazine being so situated that the foremost cartridge in the magazineis picked up directly from the magazine by said barrel during itsbackward movement.

4. Ina magazine-gun, a receiver, a maga zine communicating therewith, arestraining device to engage cartridges. about to be fed into thereceiver, a shell-ejector, and means whereby the restraining device isreleased by the movement of the ejector.

5. In a gun, a barrel, a magazine, means to feed cartridges from themagazine to the barrel, a restraining device to hold all the cartridgesagainst movement except the one being fed into the barrel while saidcartridge is thus being fed, and means adapted to be operated by thecartridge as it is placed in position to be iired to render saidrestraining device inactive.

6. A receiver, a barrel movable relatively thereto, a magazine, means tofeed cartridges from the magazine to the receiver, a restraining deviceto engage the foremost cartridge in the magazine, and automatic means torelease the restraining device when the cartridge in the receiver is inposition to be fired.

7. In a magazine-gun, a barrel, a magazine, means to feed cartridgessingly to the barrel, said means including a restraining device torestrain the movement of allcartridges except the one entering thebarrel, a shellejector, and connections between said ejector andrestraining device whereby the latter is released by the backwardmovement of the former.

8. In a magazine-gun, a receiver, a barrel slidably mounted therein, amagazine, means to feed cartridges singly from the magazine to thebarrel, said means including a restraining device to restrain themovement of all cartridges except the one entering the barrel, ashell-ejector, and means to move the re- IOO IIO

straining device into inoperative position by the backward movement ofthe ejector.

9. In a magazine-gun, a barrel, a magazine, means to feed cartridgessingly to the barrel, said means including a restrainingcatch to engagethe foremost cartridge in the magazine,Y a shell-ejector, andconnections between said ejector and catch and means to release thecatch as it is moved by the ejector whereby the latter is released bytheformer.

10. In a magazine-gun, a barrel, a magazine, a shell-ejector pin, meansto feed cartridges singly to the barrel, said means including arestraining-catch carried by said pin and adapted to engage the foremostcartridge in the magazine, and means whereby the movementl of theector-pin into preparatory position for ejecting the shell releases therestraining-catch.

ll. In a magazine-gun, a barrel, a maga- ISO 'cept that 1n the barrel.

zine., means to feed cartridges to the barrel, an ejector-pin, arestraining-catch carried thereby and adapted to engage the cartridgesas they are fed forward, and a cam on which said catch rests wherebymovement of the pin into preparatory position for ejecting the shellcauses the nose of the catch to ride up the cam and thus releases saidcatch from the cartridge.

12. In a magazine-gun, a barrel, a tubular magazine, means to feedcartridges from the magazine to the barrel, an ejector-pin, arestraining-catch carried thereby and projecting through the walls ofthe magazine, said restraining device having a nose resting on aninclined surface of said wall, whereby movement of the ejector-pin intoposition for ejecting the shell removes the catch from the path of thecartridges.

13. In a gun, a receiver having a portion constituting a breech, abarrel slidably mounted in said receiver and manually movable toward andfrom the breech, means to lock the barrel to the receiver while the gunis being fired, a tubular magazine communicating with the receiver andconstructed to receive cartridges arranged end to end, and means withinsaid magazine to feed cartridges into the receiver from the magazine atan angle to the direction of movement of the barrel whereby the foremostcartridge is picked up by the barrel during the movement of the lattertoward the breech. y

14. In a gun, a receiver having a portion constituting` a breech, abarrel slidably` mounted in the receiver and movable manually' towardand from the breech, means to lock the barrel to the receiver while thegun is being fired, a tubular magazine communicating with said receiverand having its mouth so located that the foremost cartridge in themagazine is picked up directly by the barrel as the latter is movedtoward the breech, and a restraining device to restrain the movement ofall the cartridges in the magazine ex- 15. In a gun, a receiver having aportion constituting a breech, a barrel slidably mounted therein, meansto withdraw the shell from the barrel as the latter is moved away fromthe breech, an ejector-pin engaging the shell, and means to vary theresistance to the forward movement of the barrel.

16. In a gun, a receiver having a portion constituting a breech, abarrel slidablv mounted in said receiver, means to withdraw the shellfrom the barrel as the latter is moved away from the breech, anejector-pin engaging the shell, and means to resist the movement of thebarrel, said means exerting a greater resistance during the latter part-of said movement.

17. In a gun, a receiver, a barrel slidably mounted therein, a catch toengage the shell and withdraw the latter from the barrel as it movesoutwardly, an ejector-pin also engaging the shell, a cam-surface movablewith the barrel, and a spring-pressed lever engaging said cam-surface,the latter having a rise intermediate of its ends.

18. In a gun, a receiver, a barrel slidably mounted therein, ashell-engaging catch to withdraw the shells from the barrel as thelatter moves outwardly, an ejector-pin to enthe shell, a locking memberrigid with the barrel and movable into and out of the receiver, saidlocking member having a camsurface provided with a rise, and aspringpressed lever carried by the receiver and engaging said surface,whereby as the lever passes over the rise the resistance to the movementof the barrel varies.

19. In a gun, a receiver, a barrel slidably mounted therein, a catchcarried by the receiver and adapted to engage and retain the shell asthe barrel moves outwardly, an ejector-pin, a hammer, a locking memberrigid with the barrel and movable into and out of the receiver, saidlocking member having a cam-surfaceprovided with. a riseintermediate ofits ends, and a spring-pressed cocking-lever engaging said surface,whereby as the barrel moves outwardly to open the receiver the hammer iscocked and the resistance to the movement of the barrel varies.

20. In a magazine-gun, a receiver having a breech, a barrel slidablymounted in said receiver, and adapted to be manually moved both towardand from the breech, said barrel being capable of a slight Aturningmovement in the receiver to lock it to said receiver, means to hold thebarrel from turning movement while thegun is fired and a magazinecommunicating directly with the receiver.

21 In a magazine-gun, a receiver having a breech, a barrel slidablymounted in said receiver and movable manually both toward and from thebreech, said barrel having a slight turning movement on its axis, andsaid barrel and receiver each having rigid therewith shoulders which arebrought into or carried out of engagement by the turning movement of thebarrel, means to hold said barrel from turning movement when the gun isfired and a magazine communicating directly with the receiver.

22. In a gun, a receiver, a barrel movable longitudinally thereof andcapable of having a slight turning movement on its axis and alockingmember beneath the barrel and rigid therewith, said member and receivereach having locking-shoulders which are brought into locking engagem entby the turning movement of the barrel.

23. In a gun, a receiver, a barrel movable longitudinally thereof andcapable of having a slight turning movement on its axis, and alongitudinal locking member beneath the barrel, said member and receivereach having locking-shoulders which are brought into IOC IIO

locking engagement by the turning movement of the barrel, and means tohold the shoulders in or out of engagement.

24. In a gun, a receiver, a barrel movable longitudinally thereof andcapable of having 26. In a gun, a receiver, a barrel slidably mountedtherein for manual movement in both directions and capable of turningslightly with reference to the receiver, means whereby the turningmovement of the barrel in one direction both locks the latter to thereceiver and also unlocks the trigger, and means to prevent the barrelfrom being turned when the cartridge is fired.

27. In a gun, a receiver, a barrel movable longitudinally thereof andcapable of having a slight turning movement on its axis, a lockingmember rigid with the barrel, said locking member and receiver eachhaving shoulders which are brought into engagement by the turningmovement of the barrel, means to prevent the barrel from turning whenthe gun is fired, a trigger, and means whereby the manual turningmovement of the barrel to unlock the latter locks the trigger.

28'. In a gun, a receiver, a barrel slidably mounted therein and capableof a slight turn# ing movement on its axis, means toprevent turningmovement of the barrel as the gun is fired, a trigger, and means wherebythe turning movement of the barrel in one direction both unlocks thelatter from the receiver and also locks the trigger.

29.. In a gun, a receiver, a barrel slidably mounted therein and capableof turning slightly withreference thereto, means to prevent turningmovement of the barrel when the gun is fired, a trigger, and meanswhereby the turning movement of the barrel in one direction both locksthe latter to the receiver locks the barrel from the receiver and locksthe trigger.

i 30. In a gun, a receiver, a barrel slidably mounted therein andcapable of having a slight turnin movement on its axis, a locking memberrigi with the barrel and adapted to interlock with a member rigid withthe receiver as the barrel is turned, means to prevent the barrel fromturning movement as the gun is fired, a trigger, and trigger-lockingdevices also operated by the turning movement of the barrel.

31. In a gun, a receiver, a barrel slidably mounted therein and capableof having a slight turning movement on its axis, a locking member rigidwith the barrel and adapted to interlock with the receiver as the barrelis turned, a trigger, a lock for the trigger, and connections betweensaid latter lock and the locking member whereby the trigger is lockedwhen the barrel is unlocked and vice versa.

82. In a gun, a receiver, a barrel slidably mounted therein and capableof having a slight turning movement on its axis, a locking member rigidwith the barrel and adapted to interlock with the receiver upon theturning movement of the barrel, a trigger, a trigger-locking leverpivoted to the receiver and engaging said locking member, wherebyas thebarrel is unlocked the trigger is locked.

33. In a gun, a receiver, a barrel slidably mounted therein,barrel-locking devices, a trigger, and connections between said triggerand barrel-locking devices whereby the barrel is locked when the triggeris operated.

34. In a breech-loading gun, a receiver, a barrel slidable therein andturnable on its axis to lock and unlock it, and trigger-controlled meansto prevent the barrel from turning when the trigger is operated to rethe gun.

35. In a gun, a receiver, a removable barrel slidably mounted therein, alocking member rigid with the barrel and having opposed shoulders, alocking-pin to engage the shoulders of said locking member and therebylimit the movement of the barrel.

36. In a gun, a receiver, a removable barrel slidably mounted therein, alocking member rigid with the barrel and having opposed shoulders, aremovable locking-pin carried by the receiver and when in positionadapted to engage said shoulders.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing' witnesses.

EMROE A. MCKEEN. l

Witnesses:

Louis C. SMITH, NATHAN HEARD,

TOC

